Analytical Model of Stress Field and Failure Depth in Multilayered Rock Masses of Mining Floor Based on the Transfer Matrix Method

Huang, Quan; Cheng, Jiulong

doi:10.1007/s10706-017-0277-x

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…Combined with the previous analysis of mine pressure and rock formation control theoretical results, a certain range of mining stress increasing and reducing areas form in the coal body and its floor in front of the working face and move forward with the advancement of the working face under the influence of advance abutment pressure of the working face. e distribution state of advance abutment pressure of coal and rock mass along the advancing direction of the working face is divided into three areas, namely, stress reducing, stress increasing, and original rock stress areas [19,20] (Figure 3). e stress distribution is expressed in the form of incremental △σy to facilitate the calculation and analysis and simplify the process of theoretical derivation as follows:…”

Section: Mining Stress Distribution Of the Floor Rock In The Advancing Direction Of The Working Facementioning

confidence: 99%

Deformation Mechanism and Control Technology of the Surrounding Rock of the Floor Roadway under the Influence of Mining

Zhao

Yin

2020

Advances in Civil Engineering

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Deformation and failure mechanism of the surrounding rock of the floor roadway under the influence of working face mining is complicated, and roadway control is difficult. The floor roadway of the 11123 working face in Pan’er Mine is taken as the research object of this study based on semi-infinite body theory of elastic mechanics to establish a mechanical model along the advancing direction of the working face and derive the stress expression of any point in the affected area of floor mining. According to the theoretical results, effective reinforcement and support schemes are then proposed. FLAC3D numerical simulation analyzes the stress and deformation of the surrounding rock of the floor roadway before and after the reinforcement. The numerical simulation results showed that (1) mining abutment pressure of the overlying working face forms a certain range of stress concentration on the roof and two sides of the roadway and will cause deformation and damage to the floor roadway and (2) overall bearing capacity of the surrounding rock of the roadway is significantly improved, and surface displacement of the floor roadway is reduced by 64 mm through the reinforcement and support of the floor roadway. On-site monitoring data of the floor roadway in the 11123 working face of Pan’er Mine showed that the maximum displacement of the roadway roof and two sides is controlled at approximately 80 mm, and the surrounding rock deformation of the roadway is appropriately controlled to meet the needs of safe production.

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Section: Mining Stress Distribution Of the Floor Rock In The Advancing Direction Of The Working Facementioning

confidence: 99%

Deformation Mechanism and Control Technology of the Surrounding Rock of the Floor Roadway under the Influence of Mining

Zhao

Yin

2020

Advances in Civil Engineering

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“…The cracks in the rock mass of the mine floor change due to mining induced stress changes, and the water resistance capacity is gradually reduced with the increase in mining depth and extraction, which lead to the inrush of water through the mine floor (Zhu et al 2013(Zhu et al , 2014. Therefore, we examined the deformation and failure characteristics of the rock mass of the mine floor during mining operations to prevent water-inrush through the mine floor based on in-situ tests carried out in the Yanzhou coal mine area, which is the main coal production area in Shandong Province, China (Zhu et al 2013(Zhu et al , 2016Huang and Cheng 2017).…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on mining-induced strain and failure characteristics of rock masses of mine floor

Zeng

Huang

et al. 2020

Geomatics, Natural Hazards and Risk

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“…In terms of theoretical calculation of goaf floor failure depth, Zhu et al applied semi-infinite body theory of elastic mechanics, considering the effect supporting pressure exerts on the floor, and then established a mechanical model of coal floor [1][2][3][4]. Lu et al treated limit equilibrium failure form of the floor under the supporting pressure as circular slip, applying the slip-line field's applied theory to calculate the maximum floor failure depth [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Research on failure characteristics of goaf floor in the inclined coal seam based on the fracture mechanics

Zheng-yi

Zhang

et al. 2020

SN Appl. Sci.

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Floor failure is the leading cause of mine water inrush after coal mining above the confined aquifer. Therefore, the prediction of floor failure depth is an important content of mine water prevention. The mining-induced failure depth and goaf floor characteristics are researched to grasp the goaf failure condition after the inclined coal seam mining with the theoretical analysis method. The inclined coal goaf floor's stress solving mechanics mode is set up based on the fracture mechanics theories. According to the Mohr-Coulomb criterion, the floor failure depth solving the equation is derived. With the theoretical analysis of the floor failure characteristics during the inclined coal seam mining, (1) the maximum failure depth of floor is nonlinear to the coal seam dip and the lateral pressure coefficient; the working face length, mining depth and floor cohesion positively correlate with the failure range; the floor cohesion is reversely proportional to the failure range. (2) There appears asymmetry in the layout of stress and plastic zones in the inclined coal goaf floor. Failure range and depth in-floor plastic zone increasingly enlarge when the coal face advances.

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Analytical Model of Stress Field and Failure Depth in Multilayered Rock Masses of Mining Floor Based on the Transfer Matrix Method

Cited by 8 publications

References 24 publications

Deformation Mechanism and Control Technology of the Surrounding Rock of the Floor Roadway under the Influence of Mining

Deformation Mechanism and Control Technology of the Surrounding Rock of the Floor Roadway under the Influence of Mining

Experimental investigation on mining-induced strain and failure characteristics of rock masses of mine floor

Research on failure characteristics of goaf floor in the inclined coal seam based on the fracture mechanics

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